This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI100X975S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI100 Standard Cylinder SI100X975S
The AirTAC Airtac SI100 Standard Cylinder SI100X975S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø100mm bore and 975mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI100X975S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ100 mm
- Stroke975 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → SAI100X975S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI100 Standard Cylinder SI100X975S
The AirTAC SI100X975S is a discontinued double-acting ISO 15552 profile cylinder with a 100 mm bore and 975 mm stroke. It delivers a push force of 3927 N at 0.5 MPa using a G1/2 air port. AirTAC replaced this legacy unit with the SAI100X975S, a direct upgrade retaining the exact same ISO 15552 mounting interface, stroke, output force, and porting to fit existing fixtures seamlessly.
The SAI replacement features an upgraded piston seal with two Y-shaped one-way elements for low start-up pressure and extended life. The original SI-S magnet supports legacy CS1-B/DS1-B sensors, while the SAI family uses current AirTAC switches and introduces SAIL, SAIF, and BSAI lock variants.
Airtac SI100 Standard Cylinder SI100X975S Technical Specifications
| Model | Airtac SI100 Standard Cylinder SI100X975S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI100X975S |
| Bore size | Ø100 mm |
| Stroke | 975 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI100X975S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
The SAI100X975S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI100 Standard Cylinder SI100X975S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 100 | Bore size in mm. |
| ×975 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI100 Standard Cylinder SI100X975S Is Used
Long-Stroke Material Transfer
Drives heavy pallets across 975 mm conveyor gaps where the 3927 N push force at 0.5 MPa easily overcomes rolling friction and external guides absorb side loads.
Vertical Lift Gate Actuation
Raises and lowers 200 kg loading dock gates using the full stroke, relying on a pilot check valve to prevent drift since the air cushion only decelerates near stroke end.
Large Press Ejection
Ejects formed parts from heavy industrial presses, utilizing the 7068 N push force at 0.9 MPa and the G1/2 port for rapid exhaust during retraction.
Replacing the Airtac SI100 Standard Cylinder SI100X975S with the SAI100X975S
To replace the SI100X975S, order the SAI100X975S and verify your ISO 15552 mounting accessory (such as LB foot or TC trunnion), the G1/2 port thread (PT/G/NPT), and the -S magnet requirement. Sizing both ways: a neighboring 80 mm bore yields 2513 N push at 0.5 MPa, whereas a 125 mm bore yields 6136 N, so the 100 mm bore at 3927 N is correctly specified for mid-to-heavy loads. Because this is a 975 mm stroke, external guides are strongly recommended to prevent rod bending and excessive side loads. A plain cylinder does not hold load without live air; for load holding on air loss, use an external rod lock, a pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI100X975S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI100 Standard Cylinder SI100X975S FAQ
Yes, the SI100X975S is discontinued. The direct replacement is the AirTAC SAI100X975S. It is dimensionally interchangeable per ISO 15552, matching the 100 mm bore, 975 mm stroke, G1/2 port, and mounting interface. The SAI upgrade adds a two Y-shaped element piston seal for lower start-up pressure and longer life.
The 100 mm bore features a G1/2 air port and a 25 mm piston rod. Force output is 3927 N push and 3681 N pull at 0.5 MPa, 5497 N push at 0.7 MPa, 7068 N push at 0.9 MPa, and a theoretical maximum of 801 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI100X975S
Send us the quantity and destination. We confirm price, stock and lead time on the SAI100X975S replacement — usually within 7-8 hours.